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Abstract Objectives It has been assumed that decentering is one mechanism underlying the health-promoting benefits of mindfulness. This study aimed to investigate the potential mediating role of decentering in the relationship of mindfulness with psychological problems. Moreover, this study examined whether age and clinical status moderated this relationship. Method This study systematically reviewed prior studies published until May 2023. Data were extracted from survey results in observational studies and from baseline scores in intervention studies. The technique of meta-analytic structural equation modeling (MASEM) was applied to analyze the aggregated data. Moderator analyses examined the role of individual characteristics in the relations between (1) mindfulness and decentering, (2) decentering and psychological problems, and (3) mindfulness and psychological problems. Results The final meta-analysis included 110 effect sizes extracted from 57 studies, with a total number of 18,515 participants. Overall, the MASEM results showed that mindfulness had a positive, large direct effect on decentering ( β = 0.42, 95% CI0.38, 0.47), and a negative, small-to-medium direct effect on psychological problems ( β = − 0.25, 95% CI− 0.31, − 0.20). Decentering also had a negative, modest direct effect on psychological problems ( β = − 0.24, 95% CI− 0.29, − 0.19). Regarding the indirect effect, decentering had a significant, small effect in the association between mindfulness and psychological problems ( β = − 0.10, 95% CI− 0.13, − 0.08). Moderator analyses suggested that these effects were consistent across age and clinical status. Conclusions The current results provide preliminary evidence that the correlation between mindfulness and decentering carries over to psychological problems. Understanding this correlation is an essential step towards mapping out the underlying psychological processes moving from mindfulness to psychological outcomes. The cultivation of decentering skills should be embedded in mindfulness-based training to confer benefits on psychological problems. Moreover, secular programs that do not include cultural or spiritual aspects of mindfulness need to expand their current knowledge of what decentering involves and what impedes effective decentering. Preregistration This study is not preregistered.
Lin Guo (Tue,) studied this question.